When you ask "What number is halfway between 17 and 172?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=172.
To find the number halfway between 17 and 172, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 172 into our formula, we get:
(17 + 172)/2 = 94.5
Thus, the number halfway between 17 and 172 is 94.5.
To check that our answer is correct, we subtract 17 from 94.5 and subtract 94.5 from 172 and compare the two numbers:
94.5 - 17 = 77.5
172 - 94.5 = 77.5
As you can see, the halfway number is 77.5 higher than 17 and 77.5 lower than 172. Therefore, our halfway between answer of 94.5 above is correct.
Halfway Between
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Halfway Between 17 and 173
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